A group of whistleblowers, including a number of aviation experts, have come forward in a new documentary to claim that the official explanation for the crash of TWA Flight 800 was wrong and a gas tank explosion did not bring down the flight off the coast of Long Island 17 years ago.

“..This team of investigators who actually handled the wreckage and victims’ bodies, prove that the officially proposed fuel-air explosion did not cause the crash,” reads a statement by the producers of the film, which will debut on cable network EPIX next month. “They also provide radar and forensic evidence proving that one or more ordinance explosions outside the aircraft caused the crash.” However, the statement said they did not speculate about the source or sources of any ordinance explosions.

The whistleblower team, which includes investigators-at the time-from the National Transportation Safety Board (NTSB), TWA, and the Airline Pilots Association, have since retired from their positions. They claim that at the time, they were placed under a gag order by the NTSB, which they charged falsified the official conclusion of the cause of the crash. They indicated they would elaborate more in a Wednesday media briefing.